How to curve the ball more during a serve?

I think its called the slice serve. I basically brush the ball horizontally of the side. It actually curves the ball, but most of the time it doesn't curve enough to take down the opponent or give them a hard time returning the serve. any tips on maybe the toss, way i hit, etc.?

Toss a bit more to the right (if you are a righty). Think about the swing path required to produce the brush action required. Toss the ball into the expected swing path. Here are a couple of different approaches to hitting a slice serve. See if either of these help.

I don't think that you are trying to curve the ball in the air as much as make the ball take a weird bounce when it hits the court.
To me, one of the hard things about a slice serve is that slight difference in the contact position will really change the motion/bounce of the ball. A ball hit at the 3 o'clock position (perfectly on the side) will travel really straight and bounce low and to the side, but a ball hit slightly up (e.g., brushed at the 4 o'clock position) will dip into the service box and will kick up and to the side after contact.

1) Use a Continental grip or an Eastern BH grip. (You will probably get more spin using an Eastern BH as it presents a more closed racket face to the ball at impact.)

2) To get the most pure slice (side) spin, place your toss farther to the right (if you are right handed). If you want to hit more of a topspin slice (combined topspin and slice spins), place your toss the ball farther to the left (but not as far left as you would for a kick or twist serve.)

3) If you want more pace on your serve, toss the ball into the court more and get your weight moving forward at impact.

4) Hitting an accurate/consistent can opener takes a lot of practice and timing. A topspin slice is much easier to place consistently IMHO. It has a higher net clearance and more margin for error.

5) There are lots of instructional videos online, just search for slice serve or topspin slice serve.

Your thinking is flawed.
The slice serve is NOT to hit winners, but to keep the serve IN the opponent's court without double faulting.
Curving a ball and slowing it down does not equate hitting winners.
The pros hit harder top/slices than any of us, and it's almost never a winner OR a forcing return, because the retuner can return it easily.

Your thinking is flawed.
The slice serve is NOT to hit winners, but to keep the serve IN the opponent's court without double faulting.
Curving a ball and slowing it down does not equate hitting winners.
The pros hit harder top/slices than any of us, and it's almost never a winner OR a forcing return, because the retuner can return it easily.

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You are completely wrong. Federer and others have an awesome sliced serve down the T which curves away from the returner and crashes into the fence. They use it after serving to the body or out-wide a few times, so that the returner is standing closer to the alley. They then surprise him with the slice monster, and he cannot get anywhere near it.

Another slice serve is hit by tall servers which are angled out wide. They bounce relatively short, and crash into the side boards without every going near the service line. The returner just shakes his head and walks away to the other court.